Java tutorial
/* * @(#)BackgroundGeometry.java 1.11 02/10/21 13:37:48 * * Copyright (c) 1996-2002 Sun Microsystems, Inc. All Rights Reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * - Redistribution in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of Sun Microsystems, Inc. or the names of contributors may * be used to endorse or promote products derived from this software without * specific prior written permission. * * This software is provided "AS IS," without a warranty of any kind. ALL * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY * OF SUCH DAMAGES. * * You acknowledge that Software is not designed,licensed or intended for use in * the design, construction, operation or maintenance of any nuclear facility. */ import java.applet.Applet; import java.awt.BorderLayout; import java.awt.GraphicsConfiguration; import javax.media.j3d.Appearance; import javax.media.j3d.Background; import javax.media.j3d.BoundingSphere; import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.DirectionalLight; import javax.media.j3d.Material; import javax.media.j3d.Transform3D; import javax.media.j3d.TransformGroup; import javax.vecmath.Color3f; import javax.vecmath.Point3d; import javax.vecmath.Vector3f; import com.sun.j3d.utils.applet.MainFrame; import com.sun.j3d.utils.behaviors.mouse.MouseRotate; import com.sun.j3d.utils.behaviors.mouse.MouseTranslate; import com.sun.j3d.utils.behaviors.mouse.MouseZoom; import com.sun.j3d.utils.geometry.Box; import com.sun.j3d.utils.geometry.Sphere; import com.sun.j3d.utils.image.TextureLoader; import com.sun.j3d.utils.universe.SimpleUniverse; public class BackgroundGeometry extends Applet { BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0); private java.net.URL bgImage = null; private SimpleUniverse u = null; public BranchGroup createSceneGraph() { // Create the root of the branch graph BranchGroup objRoot = new BranchGroup(); // Create a Transformgroup to scale all objects so they // appear in the scene. TransformGroup objScale = new TransformGroup(); Transform3D t3d = new Transform3D(); t3d.setScale(0.4); objScale.setTransform(t3d); objRoot.addChild(objScale); // Create the transform group node and initialize it to the // identity. Enable the TRANSFORM_WRITE capability so that // our behavior code can modify it at runtime. TransformGroup objTrans = new TransformGroup(); objScale.addChild(objTrans); Background bg = new Background(); bg.setApplicationBounds(bounds); BranchGroup backGeoBranch = new BranchGroup(); Sphere sphereObj = new Sphere(1.0f, Sphere.GENERATE_NORMALS | Sphere.GENERATE_NORMALS_INWARD | Sphere.GENERATE_TEXTURE_COORDS, 45); Appearance backgroundApp = sphereObj.getAppearance(); backGeoBranch.addChild(sphereObj); bg.setGeometry(backGeoBranch); objTrans.addChild(bg); TextureLoader tex = new TextureLoader(bgImage, new String("RGB"), this); if (tex != null) backgroundApp.setTexture(tex.getTexture()); Vector3f tranlation = new Vector3f(2.0f, 0.0f, 0.0f); Transform3D modelTransform = new Transform3D(); Transform3D tmpTransform = new Transform3D(); double angleInc = Math.PI / 8.0; double angle = 0.0; int numBoxes = 16; float scaleX[] = { 0.1f, 0.2f, 0.2f, 0.3f, 0.2f, 0.1f, 0.2f, 0.3f, 0.1f, 0.3f, 0.2f, 0.3f, 0.1f, 0.3f, 0.2f, 0.3f }; float scaleY[] = { 0.3f, 0.4f, 0.3f, 0.4f, 0.3f, 0.4f, 0.3f, 0.4f, 0.3f, 0.3f, 0.3f, 0.3f, 0.3f, 0.3f, 0.3f, 0.4f }; float scaleZ[] = { 0.3f, 0.2f, 0.1f, 0.1f, 0.3f, 0.2f, 0.1f, 0.3f, 0.3f, 0.2f, 0.1f, 0.3f, 0.3f, 0.2f, 0.1f, 0.2f }; Appearance a1 = new Appearance(); Color3f eColor = new Color3f(0.0f, 0.0f, 0.0f); Color3f sColor = new Color3f(0.5f, 0.5f, 1.0f); Color3f oColor = new Color3f(0.5f, 0.5f, 0.3f); Material m = new Material(oColor, eColor, oColor, sColor, 100.0f); m.setLightingEnable(true); a1.setMaterial(m); for (int i = 0; i < numBoxes; i++, angle += angleInc) { modelTransform.rotY(angle); tmpTransform.set(tranlation); modelTransform.mul(tmpTransform); TransformGroup tgroup = new TransformGroup(modelTransform); objTrans.addChild(tgroup); tgroup.addChild(new Box(scaleX[i], scaleY[i], scaleZ[i], Box.GENERATE_NORMALS, a1)); } // Shine it with two lights. Color3f lColor1 = new Color3f(0.7f, 0.7f, 0.7f); Color3f lColor2 = new Color3f(0.2f, 0.2f, 0.1f); Vector3f lDir1 = new Vector3f(-1.0f, -1.0f, -1.0f); Vector3f lDir2 = new Vector3f(0.0f, 0.0f, -1.0f); DirectionalLight lgt1 = new DirectionalLight(lColor1, lDir1); DirectionalLight lgt2 = new DirectionalLight(lColor2, lDir2); lgt1.setInfluencingBounds(bounds); lgt2.setInfluencingBounds(bounds); objScale.addChild(lgt1); objScale.addChild(lgt2); return objRoot; } public BackgroundGeometry() { } public BackgroundGeometry(java.net.URL bgurl) { bgImage = bgurl; } public void init() { if (bgImage == null) { // the path to the image for an applet try { bgImage = new java.net.URL(getCodeBase().toString() + "/bg.jpg"); } catch (java.net.MalformedURLException ex) { System.out.println(ex.getMessage()); System.exit(1); } } setLayout(new BorderLayout()); GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration(); Canvas3D c = new Canvas3D(config); add("Center", c); BranchGroup scene = createSceneGraph(); u = new SimpleUniverse(c); // This will move the ViewPlatform back a bit so the // objects in the scene can be viewed. u.getViewingPlatform().setNominalViewingTransform(); TransformGroup viewTrans = u.getViewingPlatform().getViewPlatformTransform(); // Create the rotate behavior node MouseRotate behavior1 = new MouseRotate(viewTrans); scene.addChild(behavior1); behavior1.setSchedulingBounds(bounds); // Create the zoom behavior node MouseZoom behavior2 = new MouseZoom(viewTrans); scene.addChild(behavior2); behavior2.setSchedulingBounds(bounds); // Create the translate behavior node MouseTranslate behavior3 = new MouseTranslate(viewTrans); scene.addChild(behavior3); behavior3.setSchedulingBounds(bounds); // Let Java 3D perform optimizations on this scene graph. scene.compile(); u.addBranchGraph(scene); } public void destroy() { u.cleanup(); } public static void main(String argv[]) { System.out.println("Usage: mouse buttons to rotate, zoom or translate the view platform transform"); System.out.println(" Note that the background geometry only changes with rotation"); // the path to the image file for an application java.net.URL bgurl = null; try { bgurl = new java.net.URL("file:bg.jpg"); } catch (java.net.MalformedURLException ex) { System.out.println(ex.getMessage()); System.exit(1); } new MainFrame(new BackgroundGeometry(bgurl), 750, 750); } }